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Ferri-kaersutite

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Formula:
NaCa
 
2
(Mg
 
3
Fe
3+
 
Ti)(Al
 
2
Si
 
6
O
 
22
)O
 
2
The Kaersutite group minerals are WO2- dominant amphiboles defined with :
A(Na+K+2Ca)> 0.5 apfu,
B: Ca dominant
CTi > 0.5 apfu and
WO > 1.0 apfu


Ferri-kaersutite is defined with
A position: Na dominant
C2+ position: Mg dominant
C3+ position: Fe dominant
System:Monoclinic
Member of:Kaersutite Group > w(O)-dominant Amphibole Group > Amphibole Supergroup


Ferri-kaersutite from the type locality was renamed oxo-magnesio-hastingsite by Zaitsev et al.(2013) in the aftermath of the 2012 amphibole nomenclature report. Ferri-kaersutite now (2014) seems to be a "named" amphibole.

Classification of Ferri-kaersutite

IMA status:Published without Approval 2013
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Crystallography of Ferri-kaersutite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/m {B1 1 2/m} {C2/m} {C1 2/m 1}

Chemical Properties of Ferri-kaersutite

Formula:
NaCa
 
2
(Mg
 
3
Fe
3+
 
Ti)(Al
 
2
Si
 
6
O
 
22
)O
 
2


The Kaersutite group minerals are WO2- dominant amphiboles defined with :
A(Na+K+2Ca)> 0.5 apfu,
B: Ca dominant
CTi > 0.5 apfu and
WO > 1.0 apfu


Ferri-kaersutite is defined with
A position: Na dominant
C2+ position: Mg dominant
C3+ position: Fe dominant
Simplified for copy/paste:NaCa2(Mg3Fe3+Ti)(Al2Si6O22)O2
Essential elements:Al, Ca, Fe, Mg, Na, O, Si, Ti
All elements listed in formula:Al, Ca, Fe, Mg, Na, O, Si, Ti

Relationship of Ferri-kaersutite to other Species

Member of:Kaersutite Group > w(O)-dominant Amphibole Group > Amphibole Supergroup
Other Members of Group:

- +
Ferro-kaersutite
{Na}{Ca
 
2
}{Fe
2+
3
AlTi}(Al
 
2
Si
 
6
O
 
22
)O
 
2
Kaersutite
{Na}{Ca
 
2
}{Mg
 
3
AlTi}(Al
 
2
Si
 
6
O
 
22
)O
 
2

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Ferri-kaersutite

Reference List:

- +
Kent Brooks, R.G Platt (1975): Kaersutite-bearing gabbroic inclusions and the late
dike swarm of Kangerdlugssuaq, East Greenland. Mineralogical Magazine Vol 40 pp 259-283

Zaitsev, A.N., Avdontseva, E.Y.,Britvin, S.N., Deme´ny, A., Homonnay, Z., Jeffries, T., Keller, J., Krivovichev, V.G., Markl, G., Platonova, N.V., Siidra, O.I. and Spratt, J. (2011): Ferrikaersutite, IMA 2011-035.CNMNC Newsletter No. 10, October 2011, page 2556

Frank C. Hawthorne, Roberta Oberti, George E. Harlow, Walter V. Maresch, Robert F. Martin, John C. Schumacer, Mark D. Welch (2012): Nomenclature of the amphibole supergroup, American Mineralogist, Volume 97, pages 2031–2048

Zaitsev A N, Avdontseva E Y, Britvin S N, Demény A, Homonnay Z, Jeffries T E, Keller J, Krivovichev V G, Markl G, Platonova N V, Siidra O I, Spratt J, Vennemann T (2013) Oxo-magnesio-hastingsite, NaCa2(Mg2Fe3+3)(Al2Si6)O22O2, a new anhydrous amphibole from the Deeti volcanic cone, Gregory rift, northern Tanzania. Mineralogical Magazine 77, 2773-2792

Internet Links for Ferri-kaersutite

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  • Localities for Ferri-kaersutite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Germany
     
    • Rhineland-Palatinate
      • Eifel
        • Mendig
          • Bell
    Nikita Chukanov exchange list
    Greenland
     
    • Sermersooq
    Kent Brooks, R.G Platt (1975): Kaersutite-bearing gabbroic inclusions and the late dike swarm of Kangerdlugssuaq, East Greenland. Mineralogical Magazine Vol 40 pp 259-283
    Kenya
     
    • Rift Valley Province
      • Gregory Rift
    Zaitsev, A.N., Avdontseva, E.Y.,Britvin, S.N., Deme´ny, A., Homonnay, Z., Jeffries, T., Keller, J., Krivovichev, V.G., Markl, G., Platonova, N.V., Siidra, O.I. and Spratt, J. (2011): Ferrikaersutite, IMA 2011-035.CNMNC Newsletter No. 10, October 2011, page 2556
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